Glass dynamics and scaling behaviour under pressure using quasielastic nuclear forward scattering
We have investigated the influence of pressure on the α-relaxation in dibutylphthalate/ferrocene using quasielastic nuclear forward scattering of synchrotron radiation, in a temperature range between 150 and 250 K and for pressures up to 4kbar. As expected, the dynamics is considerably slowed down when increasing pressure. Checking the pressure-temperature superposition principle for the relaxation rates proves that the scaling on equal density does not hold for the dynamics on atomic length scales.
KeywordsEuropean Synchrotron Radiation Facility Quantum Beat Excess Free Volume Refractive Lens Large Relaxation Time
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